This guideline applies to heating, ventilating, air-conditioning and sanitary installations for all sections of outdoor swimming pools. It applies to outdoor swimming pools of all types excluding but swimming pools for family use only.In developing the recommendations regarding the technical facilities, the user behaviour specific to outdoor swimming pools was taken into account. Outdoor swimming pools are, as a rule, predominantly used on sunny days, by guest in bathing garments. This has been taken into account in formulating the requirements for technical equipment and water temperatures. The use of regenerative energies and energy-saving techniques for pool and shower water have been given particular attention.